tmarcel

hassan,

Personally, I'd just install a smaller restrictor pill or even better an aftermarket 3-port bcs. Both considerably inexpensive compared to that replacement actuator. They're all reasonable solutions to holding boost better.

YzBrad99

Yeah this WGA isnt going to do what you think if you just simply only bolt it on. I did it with my car with a forge and FP 18psi WGA

Evo a Mula

iTrader: (10)

i used the forged got a discount on mine so i got it and top end boost holds much better

cueburner

Did u just bolt it on, or did u get a tune afterwards?

meat_EVO

iTrader: (7)

you dont gain any power with it.

someone i know put just a forge WGA on his car and dynod less then me on the same dyno. stock vs stock + WGA.

EndlessRed

iTrader: (17)

wga at best only changes your power curve, it doesn't add hp.

Hassan!

The problem is how to get these stuff and where get it from?!
How to install it?
You see most people have no experience with turbos! My other cars was solid v6 or v8 engine!
What can i do to reduce turbo lag?!
I do a lot of drift and the lag bothering me so much!
HELP.

WarmAndSCSI

Yeah, then the peak boost level dropped and the WGA needed to be adjusted further. Most of these have a stronger spring and are more capable of keeping the wastegate flapper shut at higher RPM.

No. If you're making peak power up top anyway, and the WGA enables your wastegate flapper to stay perfectly shut up top, allowing you to make more boost; then you're going to end up making more peak HP.

meat_EVO

iTrader: (7)

not the case, he hit 26psi vs my 23psi. he made 1 less whp. go figure

WarmAndSCSI

Do you actually do any tuning yourself? There are so many factors involved, it's not even funny. Could have been substantially more knock after the wastegate upgrade, and the ECU loves to pull timing and dump fuel on these engines. Unless you know for sure, stop speculating because what you're saying is highly debatable.

Hiboost

iTrader: (9)

I've dynoed before and after, when using a Manual boost controller to keep boost levels the same it will hold more boost in the mid range where you might see 15-20 whp gains. I was already maxxed at low RPM's and above 5500 rpms the turbo begins to taper from 25 psi down to 19 psi at 7500 rpms regardless of the wastgate being held shut by a stronger actuator.

So due to this mod only helping midrange boost it really won't show up on peak HP numbers at 6000-6500 because you can't force the turbo to hold any more boost than it was before. That is easily why it might show up as making less peak HP but if you overlay the dyno graphs there would be more HP and torque from 4000-5500 for sure. Here are my dyno plots:

https://www.evolutionm.net/forums/ev...ore-boost.html

Basically you will want to get a tune to adjust the boost levels or use a MBC if you get a Forge WGA. Like others have said the stock boost control is assuming a WGA spring opening pressure of 10-12 psi , not 19-24 psi so it will overboost if you don't plan ahead.

Hiboost

iTrader: (9)

On the stock turbo the boost tapers starting at 5500 rpm's. Assuming that best case scenario you are tapered down to 22 psi by 6500, it doesn't matter if you had 26 psi or 23 psi at lower RPM's the extra boost won't improve the peak HP numbers. In fact it may even hurt them if the hotter intake charge is heat soaking the intercooler enough through the run.

Ltdanish07

iTrader: (1)

Hassan, look into the DIY w/g mod. Your boost wont taper down as far and helps hold boost in the top end. (if i understand correctly)

meat_EVO

iTrader: (7)

all i was saying is that the wastegate alone dose not add 40whp as stated and i was talking about some results that i knew of that stated this as a fact. other then that, you sound like you know everything in the world.

once again... i was simply aswereing the guys question when he asked if you gained 40whp from this mod.

answer is no.

EndlessRed

iTrader: (17)

true, but what i'm saying is that a uprated wga doesn't add hp. higher boost does.